Iran at the 2012 Summer Olympics

Iran (officially the Islamic Republic of Iran) competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. The nation has competed at every Summer Olympic games since its official debut in 1948 with the exception of the 1980 and 1984 Summer Olympics. The National Olympic Committee of the Islamic Republic of Iran sent the nation's second-largest delegation to the Games, one less than it sent to Beijing. A total of 53 athletes, 45 men and 8 women, competed in 14 sports. This was also the youngest delegation in Iran's Olympic history, with half the team under the age of 25, and many of them are expected to reach their peak in time for the 2016 Summer Olympics in Rio de Janeiro. Heavyweight boxer Ali Mazaheri was the nation's flag bearer at the opening ceremony.

Iran left London with a total of 13 medals (7 gold, 5 silver, and 1 bronze), finishing twelfth in the overall medal standings. This was also the most successful Olympics for the Middle East, winning the largest number of medals at a single games, and surpassing by just double the record from Athens. Notable accomplishments included the nation's first gold medals in men's Greco-Roman wrestling, and the nation's first medal in athletics, won by discus thrower Ehsan Haddadi.